LONDON — The last U.K. resident imprisoned at Guantánamo Bay, Cuba, returned home to Britain on Friday after almost 14 years in which he became a defiant spokesman for fellow prisoners.

"My thanks go to Allah first, second to my wife, my family, to my kids and then to my lawyers who did everything they could to carry the word to the world,” he said. “I feel obliged to every individual who fought for justice, not just for me, but to bring an end to Guantánamo.”